Backport positional argument handler fix.

README.md

@@ -58,6 +58,7 @@ println!("{file:?} -> {out:?} (number: {number:?})",
 ### Changelog ###
 
 main:
+ * Fixed coerced `ArgumentError` not being rewritten for positional arguments.
  * Moved top level includes to `pub use`.
 
 v0.2.1:

jaarg/src/argparse.rs

@@ -232,7 +232,7 @@ impl<ID: 'static> Opts<ID> {
         // Find the next positional argument
         for (i, option) in self.options[state.positional_index..].iter().enumerate() {
           if matches!(option.r#type, OptType::Positional) {
-            handler(program_name, &option.id, option, option.first_name(), token)?;
+            call_handler(option, option.first_name(), token)?;
             state.positional_index += i + 1;
             return Ok(ParseControl::Continue);
           }